Circuit-interrupter for therapeutical apparatus.



F. M. & M. H. KIDDER.

CIRCUIT INTERRUPTER FOR THERAPEUTICAL APPARATUS.

APPLICATION FILED JAN. 7, 1914 1,1 17,857. Patented Nov. 17, 1914.

a mm D INVENTORJ WITNESSES HR Fra 1w n'swi'orb JiTJizdder ATTORNEYS tersfor high frequency apparatus as used I IHY; ES PAT NT OFFICE.

rm mm; KIIDDER'AND MILTON KIJSIJER, on NEW YORK, N. Y.

omCUI'r IN'rERRUPTER FOR HER PE IC AL APPARATUS.

' To all whom it may concern:

Be it known that we, FRANCIS M. KIDDER and MILTON H. Kroner, citizens oftheUnited s and State of and Improved Circuit-Interrupter for ThertOJimprove and simplify the COIlStIllCtlOD I and operation of apparatus ofthe character 'apeutical Apparatus, of which the following is a full,clear and exact description.

'Thisinventlon relates to circuit interrupfor therapeutical treatments,although the invention is not necessarilylimited to this use.

The invention has for its general objects referred to soa stonbereliable and efiicient in use, comparatively inexpensive to menufactureandof such design as to be convenien'tly handled.

A morejspecific object of the invention is the provision of novel meansfor regulating the strength of the treating current by ad- ;jus'tin I s'there eing used .in connection with th e sa d adjusting means a' devicewhereby it'is 1m- .the armature; of the interrupter,

possible to adjust the armature beyond its "vibratory limit, or tooclose to the pole of which willfappear as the description pro- Yceeds,the invention comprises various novel y features of constructionandarrangement of up ended hereto.

theinterrupter. I

With these objects'in view, and others arts such as will be setforthwith particuarityin thefollowingdescription and claims 11 theaccompanying drawing, which I illustrates one embodiment of theinvention,

and wherein similar characters of reference indicate correspondingpa'rts in all the views,

, Figure 1 is a perspective view of the complete apparatus forgenerating ultra-violet rays Fig. ,2 is a detail view of parts of thevibrator]; Fig. 3 is a diagrammatic view of thecircuit connections; Fig.1 is'a side view ofa modification showinga stop means for preventing thearmature from being ad'- I justable too near to or against the core of.5

the vibratin "coiligFig. 5 isa perspective view 'of the racket forsupportingthe said stop means; ,Fi 6 is a perspective v ew ofthe'pawloft e stop 'means; Fig. 7 1s a perspective view of, the armatureadjusting screw and ratchet wheelwithwhich the pawl 'engag'es.

. Specification of Iietterslatent. Patented N v, 17 1914. Applicationfiled January 7, 1914. Serial Ne. 810,812.

Referring to the drawing, A designates'an evacuated tube or electrode ofany desired type which'produces ultra-violetrays, the same beingremovablyinserted in one end of the handle B, which has attached theretoa current supply cord G hi is provided 2:

with a plug for "connection witha suitable supply socket.

W1th1n the handle B are arranged electrlcal devices shown in thediagram, Fig.

3, which shows the leading in wires '19 and -connected respectivelywiththe switch opposite terminal connected'by th i 23 1 with the contact*Itiof theiswitch. The secondary WlIldIIlg s has onefterminal connected-W1l3l'l the wire 23 while its opposite terminal is connected withthesplit sleeve 1 or contact 4'that receives the electrode contact (notshown) on the electrode .A. Ar-

rangedinshunt relation to the parts 11 and 13 of the vibrator isthecondenser 7, one

terminal of'which is connected by the wire 24 with the Wire 21, and theother terminal is connected by a wire 25 with the wire 23. Coacting withthe contacts 16, 16 is a movable contact 17 which is pivotally fastenedto the slide 18, Fig. 1, so that, as the device is held in the hand, ofthe operator, it "is merely necessary to move the slide'18 backand'forth by the thumb to open or close the circuit. 2

In operatiorn'the' currentjwhen turned on traverses the magnet windingsfiwhich ener gizethe magnet core 5 that causes the armature 12 to beattracted away from the con: tact 13, thereby breaking the rimarycircuit and causingthe magnet to g just ment of'the, contact 13, and asa result there'is an intermittent charging and discharging'ofthecondenser, which is shunted on the interrupter contacts, so'that thehigh frequency osclllator currents, characteris- I tic of condenserdiscarges, are sent through I ecome deener- 'gized, whereby the circuit isagain closed the primary 7), thereby inducing a high fre quency and highvoltage alternating current in the secondary winding 3, wherebyultraviolet rays are caused to be generated in the electrode A in thewell-known manner. The primary circuit is readily controlled by themanipulation of the switch on the handle, and by turning the knob 14 ofthe vibrator screw the intensity of the ultra-violet rays can be varied.

On the heads 1 and 2 of the handle are axially projecting spaced post-s1, 2 which serve as convenient means whereby the cord C can be woundback and forth on the handle from one end to the other in loops forminga figure 8. The posts serve to retain the ends of the loops of the coilson the handle. By this means the whole apparatus takes up comparativelylittle space and can be conveniently carried in the pocket.

There is a liability, in adjusting the vibrator, of screwing thearmature down into contact with the core of the vibrating coil, wherebythe vibrating function is destroyed and a continuous current will flowthrough the coil with the possibility of the latter burning out. Asafety device is therefore desirable to prevent this abnormal adjustmentof the armature, and consequently means for limiting or stopping theeffective adjustment of the armature toward the coil core is provided inthe nature shown in Figs. 5 to 7 inclusive. Fastened to the core is abracket 30 which has a pair of arms 31 and 32 for supporting a pivotedpawl 33, said pawl having a hub or base portion 34 provided withjournals 35 and 36 which engage respectively in a bearing opening 37 inthe lug 81 and in a bearing forming screw 38 in the lug 32. The upperend 39 of the pawl is adapted to engage with a ratchet wheel 40 fixed onthe armature adjusting screw 14L. Projecting from the base portion ofthe pawl is a spring arm 41 which engages under the armature spring 11,so that when the armature is moved toward the core of the coil the pawlextremity 39 is thrown into engagement with the ratchet wheel 40,thereby preventing the screw 14 from being turned any further, andbringing the armature in contact with the coil core. To provide for theproper adjustment of the parts the bracket 30 has a slot 4:2 forreceiving the screw 4E3 which fastens the bracket in place, and byreason of this slot the bracket can be raised or lowered, therebybringing the spring arm 41 into proper relation with the armature. Tokeep the pawl normally away from the ratchet wheel 40. the bracket 30has a spring 44 so arranged that its free end will engage the base ofthe pawl at the side of the pivotal axis thereof opposite from theextremity 30, and consequently such extremity 39 is held away from theratchet wheel.

From the foregoing description taken in connection with the accompanyingdrawings, the advantages of the construction and method of operationwillbe readily understood by those skilled in the art to which theinvention appertains,and while we have described the principle ofoperation, together with the apparatus which we now consider to be thebest embodiment thereof, we desire to have it understood that theapparatus shown is merely illustrative, and that such changes may bemade when desired as are within the scope of the appended claims.

Having thus described our invention, we claim as new and desire tosecure by Letters Patent:

1. The combination of an induction coil including a core, an armaturemovably mounted with respectto the core, a movably mounted memberengaged with the armature and movable therewith, means for adjusting theposition of the armature, and a stop device movable with the said meansand arranged to be engaged by the said member, whereby the latterprevents the armature from being adjusted into contact with the core.

2. The combination of a vibrator coil, an armature for the coil, aspring tensioning the armature away from the coil, means adjustable forobtaining the initial position of the armature, and means for preventingthe armature from being adjusted by the firstmentioned means to a pointbeyond the vibratory action of the said spring.

3. The combination of a vibrator coil, an armature therefor, meansadjustable to vary the position of the armature, and means for limitingthe adjustment of the armature toward the coil.

4. In an apparatus of the class described, the combination of a coil, anarmature attracted thereby, a spring tensioning the armature away fromthe coil, means for ad justing the initial position of the armature,

and a stop device movable with the adjustment of the armature andoperative :to prevent movement of the said adjusting means beyond acertain point.

the combination of a coil, an armature attracted thereby, a springtensioning the armature away from the coil, a screw for adjusting thearmature toward the coil, a

o. in an apparatus of the class described,

spring-pressed pawl mounted adjacent the arn'iature and having ayielding member operatively connecting the pawl and armature, and anelement carried by the screw and with which the pawl engages to preventfurther turning of the screw when the armature is at its minimumoperative distance from the coil.

6. The combination of a vibrator coil including a core, a movablearmature, a pivoted member engaging the armature to be moved thereby inone direction, a spring operating on the member to move it in theopposite direction, a screw'for adjustin% the 7 position of thearmature, a; support xed with respect to the core and in which the screwis threaded, and a member carried by and movable with the screw andarranged to arrest the movement of the first-mentioned member before thearmature is adjusted to nonvibratory positlon.

In testimony whereof we have signed our 10 namesto this specification inthe presence of two subscribing witnesses.

FRANCIS M. Ki-DDER. MILTON H. KIDDER.

Witnesses: v

CHA'ITIN BRADWAY, A. W. HART.

06p! of patent my be obtained for five cents each, by addressing thecommunion: of Patent,

Washington, D. G.

